What Causes Chronic Fatigue And Abdominal Bloating?

MY WIFE IS VERY TIRED WITH NO ENERGY. JUST WANTS TO SLEEP ALL THE TIME. NO AMBITION. SHE WALKS UP A FLIGHT OF STAIRS AND SHE IS COMPLETELY OUT OF BREATH. DRINKS LOTS OF WATER AND BLOATS WHEN SHE EATS WHICH MAKES IT HARDER TO BREATH. SHE WAS PRETTY SICK LAST WEEK WITH CHEST CONGESTION